Frost Dates for Gravenhurst, ON

Based on data from Coldwater Warminster weather station, 21 miles away

Elevation: 260 m

Frost Dates

Last Spring Frost (50%) iA 50% chance that the last spring frost has already passed by this date. Most gardeners use this as their primary planting guide. May 8
First Fall Frost (50%) iA 50% chance that the first fall frost has occurred by this date. Plan to harvest or protect tender plants before this date. October 13
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

30% Probability iOnly a 30% chance of frost remaining by this date. Use these dates for a safer planting window, especially for tender plants sensitive to cold.

Last Spring Frost May 13
First Fall Frost October 8

Hard Freeze (−2°C)

Last Spring Hard Freeze April 24
First Fall Hard Freeze October 26
44.92°N, -79.37°W © OpenStreetMap

Growing Season

158 Days May 8 to October 13

USDA Hardiness Zone iHardiness zones indicate which perennial plants can survive winter in your area. For annual vegetables, frost dates and growing season length matter more than hardiness zone.

Zone 5a

Avg. annual minimum: −20 to −15°F (−29 to −26°C)

Learn more

Köppen Climate iThe Köppen climate classification system categorizes climates based on temperature and precipitation patterns.

Dfb Warm-Summer Continental

Warm summers and cold, snowy winters. A shorter growing season than hot-summer continental. Hardy vegetables, root crops, and cool-season greens do well. Season extension is valuable.

Köppen climate map

Temperature

-15° 0° 15° 30°
-9°
High: -5°C
Avg: -9°C
Low: -13°C
Jan
-7°
High: -3°C
Avg: -7°C
Low: -12°C
Feb
-2°
High: 3°C
Avg: -2°C
Low: -7°C
Mar
5°
High: 10°C
Avg: 5°C
Low: 0°C
Apr
13°
High: 18°C
Avg: 13°C
Low: 7°C
May
18°
High: 23°C
Avg: 18°C
Low: 12°C
Jun
21°
High: 26°C
Avg: 21°C
Low: 15°C
Jul
20°
High: 25°C
Avg: 20°C
Low: 15°C
Aug
16°
High: 21°C
Avg: 16°C
Low: 11°C
Sep
9°
High: 13°C
Avg: 9°C
Low: 5°C
Oct
2°
High: 6°C
Avg: 2°C
Low: -1°C
Nov
-4°
High: 0°C
Avg: -4°C
Low: -7°C
Dec
0°C
−2°C
Avg High Avg Temp Avg Low Light Frost (0°C) Hard Frost (−2°C)

Precipitation

0 mm 50 mm 100 mm
114 mm
114.3 mm
Jan
76 mm
76.2 mm
Feb
66 mm
66.0 mm
Mar
94 mm
94.0 mm
Apr
91 mm
91.4 mm
May
86 mm
86.4 mm
Jun
91 mm
91.4 mm
Jul
91 mm
91.4 mm
Aug
74 mm
73.7 mm
Sep
99 mm
99.1 mm
Oct
91 mm
91.4 mm
Nov
112 mm
111.8 mm
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10h11.5h13.5h14.5h15.5h15h14h12.5h10.5h9.5h8.5h
Jan: 7:58 AM – 4:57 PM · 8h 59m
Feb: 7:27 AM – 5:39 PM · 10h 12m
Mar: 7:39 AM – 7:17 PM · 11h 38m
Apr: 6:41 AM – 7:56 PM · 13h 15m
May: 5:56 AM – 8:33 PM · 14h 37m
Jun: 5:38 AM – 8:59 PM · 15h 21m
Jul: 5:52 AM – 8:55 PM · 15h 03m
Aug: 6:26 AM – 8:18 PM · 13h 52m
Sep: 7:04 AM – 7:21 PM · 12h 18m
Oct: 7:42 AM – 6:25 PM · 10h 43m
Nov: 7:23 AM – 4:43 PM · 9h 20m
Dec: 7:55 AM – 4:33 PM · 8h 38m
Daylight Eastern Time (ET) Longest: 15h 23m · Shortest: 8h 37m

Nearby Stations

Orillia Brain, ON May 5 - October 15 Lagoon City, ON April 24 - October 22 Shanty Bay, ONMay 11 - October 9 Egbert Cs, ONMay 13 - October 10 Udora, ONMay 15 - October 4 Borden Awos, ON May 24 - September 16

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